Effect of glycol and filler types on some polymeric composite properties

Abstract

Two unsaturated polyesters based on maleic anhydride, phthalic anhydride, and sebasic acid with each of linear 1,6-hexanediol (PE L ) and cyclic 1,4-cyclohexanediol (PE C ) were prepared. Their structures were characterized by IR and 1 H NMR spectra. Their composites were prepared by mixing different ratios (60, 70, and 80%) with talc and kaolin with polyester/styrene mixture. The effect of linear and cyclic glycols and the effect of filler type and concentration of these composites were studied in terms of their electrical properties and the hardness before and after aging. The thermal behavior of styrenated polyesters and their composites was studied using thermogravimetric analysis. It has been found that both fillers increase the thermal stability and decrease the weight loss. The permittivity e 0 and the dielectric loss e 00 were measured in the frequency range 100 Hz up to 100 kHz at room temperature 258C 6 1. The polyester composite samples containing 70% filler lead to good electrical properties in addition to its resistance to thermal aging. The hardness value was increased by increasing the filler content before and after aging. The polyester composites based on cyclic glycol and loaded with 80% kaolin gave the highest hardness values.

The effect of modified pluronic on the distribution of fillers in the polyvinyl chloride matrix

“…From these figures, it is seen that the glass transition temperatures ( T g s) are only affected by the presence of MPL as mentioned above not change by the addition of filler. This finding suggests that there is no interaction between the two fillers under investigation and the PVC matrix 25…”

Some studies on poly(ethylene-co-vinyl acetate), acrylonitrile butadiene copolymer, and their blend reinforced with carbon black

“…The enhancement of thermal stability with increasing fillers loading in the polymer matrix using different fillers has been reported. 31,32 Moreover, the effective filler–matrix interaction provides strength to the composites and enhances their thermal stability.…”

High yield production of 1,4-cyclohexanediol and 1,4-cyclohexanediamine from high molecular-weight lignin oil

“…1,4-cyclohexanediol (14CHDO) is a valuable compound that has been shown useful as a monomer to produce polycarbonates, polyethers and polyesters including scratch resistant coatings as well as supramolecular associations owing to the distinct cis/trans isomerism of this molecule (Figure 1A). [18][19][20][21] 14CHDO serves as a direct synthetic precursor to a range of pharmaceuticals, typically by the functionalization of one or both hydroxyl groups. [22] Exemplary in this respect are the synthetic routes to phenyl cyclohexylcarboxamides, Dihydroartemisinin and derivatives, compounds with distinct anticancer properties.…”